package com.itheima;

import java.util.*;

public class CollectionsDemo {
    public static void main(String[] args){
        //extracted();
        text1();
    }

    private static void extracted() {
        List<String> list = new LinkedList<>();
        Collections.addAll(list,"张三","李四","王五","赵六");
        list.forEach(System.out::println);

        //打乱集合的顺序
        Collections.shuffle(list);
        list.forEach(System.out::println);
    }

    public static void text1(){
        List<Integer> list = new ArrayList<>();
        Collections.addAll(list,1,2,3,4,5,6,7,8,9,10);
        //按照倒序排
        Collections.sort(list);
        list.forEach(System.out::println);
        Collections.sort(list, new Comparator<Integer>() {
            @Override
            public int compare(Integer o1, Integer o2) {
                return o2-o1;
            }
        });
        System.out.println("------------------");
        list.forEach(System.out::println);

        //让学生实现Comparable接口，这样也能给学生排序
        List<Student> list1 = new ArrayList<>();
        list1.add(new Student("张三",21));
        list1.add(new Student("李四",19));
        list1.add(new Student("王五",20));
        Collections.sort(list1);
        list1.forEach(System.out::println);

    }
}
